/**
 * #      236
 * 名称   二叉树的最近公共祖先
 * 链接   https://leetcode-cn.com/problems/lowest-common-ancestor-of-a-binary-tree
 * 题解   [994](https://leetcode-cn.com/problems/lowest-common-ancestor-of-a-binary-tree/solution)
 * 通过率 66.8%
 * 难道   中等
 */

